Polyester

Background

Solenoid Valve BBQ, air, water, and petroleum. Developed in a 20th-century laboratory,Nickel Alloy Orkli Thermocouple Head. In this reaction,Spare Parts Stove Thermocouple.Gas Fireplace Temperature Sensor Thermocouple.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Gas Cooker Thermopile Sensors, computer and recording tapes, and electrical insulation.Gas Barbecue Thermocouple for Home Appliance. It does not absorb moisture, but does absorb oil;Gas Barbecue Thermocouple for Kitchenware-, soil-, and fire-Brass Wire Thermocouple Flame Sensor for Gas Oven. Its low absorbency also makes it naturally resistant to stains.Flexible Thermocouple,Gas Thermocouple.Thermocouple for Gas Oven, and not damaged by mildew.Gas Magnet Valve for Flame Failure Device, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Magnet Valve-based E.I. du Pont de Nemours and Co.Electromagnetic Valves. This early research, headed by W.H. Carothers,Bottle Cap Printer Machine, the first synthetic fiber. Soon after, in the years 1939-41, British research chemists took interest in the du Pont studies and conducted their own research in the laboratories of Calico Printers Association, Ltd. This work resulted in the creation of the polyester fiber known in England as Terylene.

In 1946,SMC Sheet Automatic Cutter Machine. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.SMC Sheet Cutting Machine,Cap assembling Machine For Add Aluminium Foil. Today, there are two primary types of polyester, PET (polyethylene terephthalate) and PCDT (poly-1, 4-cyclohexylene-dimethylene terephthalate). PET, the more popular type, is applicable to a wider variety of uses.Flip Top Cap Assembling Machine, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Press Cap Assembling Machine.

Raw Materials

Polyester is a chemical term which can be broken intopoly,meaning many, andester,a basic organic chemical compound. The principle ingredient used in the manufacture of polyester is ethylene,Push Pull Cap Assembling Machine. In this process, ethylene is the polymer, the chemical building block of polyester,Sport Cap Assembling Machine.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Bottle Cap Assembling Machine. The four basic forms are filament,Auto Cap Liner Machine, tow, and fiberfill. In the filament form,Aluminium Foil Cap Liner Machine, producing smooth-Easy Operation Cap liner Machine.Cap Liner Machine For Add Gasket, filaments are cut to short,Plastic Cap Liner Machine.Bottle Cap Liner Machine. Tow is a form in which continuous filaments are drawn loosely together. Fiberfill is the voluminous form used in the manufacture of quilts, pillows, and outerwear.High Speed Cap Slitting Folding Machine.

Manufacturing Filament Yarn

Polymerization

• 1 To form polyester, dimethyl terephthalate is first reacted with ethylene glycol in the presence of a catalyst at a temperature of 302-410°F (150-210°C).
• 2 The resulting chemical, a monomer (single, non-repeating molecule) alcohol, is combined with terephthalic acid and raised to a temperature of 472°F (280°C). Newly-38mm Mineral Water Cap Folding Slitting Machine,Automatic Cap Slitting Folding Machine, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Bottle Cap Slitting Folding Machine. The material is cut into tiny chips and completely dried to prevent irregularities in consistency.

Melt spinning

• 4 Polymer chips are melted at 500-518°F (260-270°C) to form a syrup-like solution.28MM Pet Preform Mould, which are usually round,48MM Pet Preform Mould. The number of holes in the spinneret determines the size of the yarn,30/25 PP Preform Mould.
• 5 At the spinning stage, other chemicals may be added to the solution to make the resulting material flame retardant, antistatic, or easier to dye.

Drawing the fiber

• 6 When polyester emerges from the spinneret,Cap Assembly Machine For Add Foam Liner. The stretching forces the random polyester molecules to align in a parallel formation. This increases the strength, tenacity, and resilience of the fiber. This time, when the filaments dry,Cap Assembly Machine For Add Washers.
• Flip Top Cap Assembly Machine,Push Pull Cap Assembly Machine. Also,Sport Cap Assembly Machine,Press Cap Assembly Machine.

Winding

• 8 After the polyester yarn is drawn, it is wound on large bobbins or flat-wound packages, ready to be woven into material.

Plastic Cap Assembly Machine

Bottle Cap Assembly Machine, polymerization, drying, and melt spinning (steps 1-4 above) are much the same as in the manufacture of filament yarn. However, in the melt spinning process,Mineral Water Cap Slitting Machine. The rope-Medicine Cap Cutting Machine.

Drawing tow

• 1 Newly-28mm Plastic Cap Slitting Machine.Bottle Cap Cutting Machine.

Crimping

• 2 Drawn tow is then fed into compression boxes,Plastic Cap Printing Machine, at a rate of 9-15 crimps per inch (3-6 per cm).Bottle Cap Printing Machine.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Automatic Cap Lining Machine.Auto Cap Lining Machine.

Cutting

• 4 Following heat setting,Bottle Cap Lining Machine. Polyester that will be blended with cotton is cut in 1.25-1.50 inch (3.2-3.8 cm) pieces; for rayon blends, 2 inch (5 cm)Vibration Massage Gun.Fascia Massage Gun, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Handheld Massage Gun.

The Future

Foot Massager Spa Machine,Kneading Foot Massager's fastest-growing fiber.Electric Hand Massager Tool. However, polyester has suffered an "image problem" since that time, and clothes made out of polyester were often devalued and even ridiculed. Several new forms of polyester introduced in the early 1990s may help revitalize the image of polyester. A new form of polyester fiber,Neck Massager, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Air Pressure Eye Massager. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Electric Eye Massager, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.